package transportManagement.servlet;


import java.io.IOException;
import java.security.InvalidParameterException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import accountManagement.Client;
import accountManagement.Employee;
import ticketManagement.TicketOffice;
import transportManagement.TransportBoard;
import transportManagement.Transport;

/**
 * Servlet implementation class ServletDettagliCorsa
 */
@WebServlet("/ServletViewTransportDetails")
public class ServletViewTransportDetails extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServletViewTransportDetails() {
        super();
    }

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doService(request, response);
	}
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doService(request, response);
	}

    private void doService(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    	try {
    		Object user = request.getSession().getAttribute("user");
        	if(user == null || (!(user instanceof Client) && !(user instanceof Employee))) {
        		throw new InvalidParameterException("Non disponi dei privilegi necessari per accedere alla pagina richiesta");
        	}
			String transportId = request.getParameter("transportId");
			
			Transport transport = new Transport();
			transport.setTransportId(transportId);
			
			List<Transport> result = TransportBoard.getInstance().search(transport);
			
			if(result.size() != 1) {
				throw new InvalidParameterException("Transport not found");
			}
			transport = result.get(0);
			
			request.setAttribute("transport", transport);
			request.setAttribute("earnings", TicketOffice.getInstance().getTransportEarnings(transport));
			request.getRequestDispatcher("/transport/details.jsp").forward(request, response);
		} catch(InvalidParameterException | NullPointerException e) {
			request.setAttribute("error", e.getMessage());
    		request.getRequestDispatcher("/errorPage.jsp").forward(request, response);
		}
    }
}
